docs: def row(self, content='', align='left'):
          """
          A row of the menu, which comprises the left and right verticals plus the given content.
  
          Returns:
              str: A row of this menu component with the specified content.
          """
          return u"{lm}{vert}{cont}{vert}".format(lm=' ' * self.margins.left,
                                                  vert=self.border_style.outer_vertical,
                                                  cont=self._format_content(content, align))